Dump-truck



B. TAYLOR.

DUMP TRUCK. A APPLICATIN ff'LED JUNE l, 1920.

- Patented Nov. 9, 1920.

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,B.TAYLOR ,l DUMP TRUCK. APPLICATIO'N FILED VJUNE 1,1920. l1 ,358,346. Patented Nov. 9, 1920 3 SHEETS-SHEET 2.

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DUMP TRUCK.

APPLICATloN F|LD1UNEI,1920.

1,358, 346. y Patented Nov. 9, 1920.

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.UWE/vra@ BLAKE TAYLOR, OF ROANOKE, VIRGINIU.

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Specicaton of Letters Patent.

Patented Nom 9, 19%@ ,application ined rune 1, i920. serial no. saaie-s.

T all whom t may concern 4 Be it known that l, BLAKE TAYLOR, a citizen of the United States of America, and resident of Roanoke, county of Roanoke, and State of Virginia, have invented certain new and useful Improvements in Dump-Trucks, of which the following is a specification.

llrhis invention relates broadly to dump trucks, and more particularly to a dump body for trucks.

l The primary object of the invention is. to provide a dump body for trucks and the like having improved mechanism associated therewith whereby actuation thereof to dumping position may be effected with a minimum of manual effort.

A further object is to provide a novel' form of body mountingand associated actuating mechanism so arranged that following initial movement of the body toward dumping position, effected by manual force, the body becomes overbalanced and is caused tov complete its movement to dump ing position by force of gravity.

With these and other objects in view, the invention resides in the features of construction, arrangement of parts and combinations of elements-which will hereinafter be fully described, 4reference being had to the accompanying drawings, in which- Figure 1 is a side elevation of the invention, showing in full lines the body in its normal upright position, and showing in broken lines approximately the position assumed when the force of gravity cornes into l 2 is a similar view showing the body in final dumping position; 'p

F ig. 3 is a rear Yend elevation; a'n'dt Figs. 4 and 5 are detail views illustrating a modified form of mounting for the body.

Referring-to said drawings, in which like designating characters distinguish likev parts throughout the several views- 1 indicates longitudinally extending' sills adapted for permanent mounting upon a truck frame or automobile chassis (not shown) and having beveled ends 2. Superposcd over said sills is a dump body 3 which, in normal position, has its front end resting upon a transverse member 4 carried by said sills or by any other suitable form of support. .Fixed on the under side of the body 3 approximately midway between the ends of the latter is a transverse bolster 50 to apivotpin 6 carried by the lower end of V a bar 7 which is, in turn, supported at its upper end by a pivot-pin 8 mounted in a suitable bearing 9 carried on theA top of the adjacent sill 1. lt will thus be apparent that, except at its front end, the body 3 is supported from the bearings 9 through the intermediacy of the arms 5 and bars 7, which elements in the normal position of the body, into parallel relation, as shown in full lines in F ig. l.

Also mounted upon the pivot-pin 6 is one end of a link 10 which extends thence forward andupward and is pivotally attached at its opposite end to one end of a lever 11. Said lever is pivotally mounted intermediate its ends upon a short rod or bolt 12 'which is mounted in the adjacent sill l. I Normally disposed in o-verlying relation to the forward end of saidlever 11 is a later ally extending bolt or pin 18 carried by the free end of an arm 14 which is liXed upona transverse shaft 15 journaled in bearings 16 mounted upon the sills. Said shaft 15 has one o f its ends projected outward a suitable distance, and rigidly mounted upon said end is the angle portion of an operating lever 17 which is of approximately l. shape and the main arm 17a of which nor mally occupies the upwardly and forwardly inclined position shown in full lines in Fig.-

1. The other arm 17h of said operating lever is downwardly and forwardly inclined and has its free end pivotally attached to the lower end portion of a link 18 which is upwardly and forwardly inclined and which has its opposite end pivotally connected to the body` 1 at a point adjacent to the front end of the latter.

ln practice, when the body 3 is to be shifted to dumping position, the operating lever is rst swung back manually to approximately the position indicated in broken lines in Fig. 1. This movement results, first, through the lever arm 17h and the link 18, in elevating the' front end of the body 3 from its seated position on the supporting member 4, and, second, in forclng said body to move in a rearward direction upon supports which consist of the arms 5 and. bars 7. In said movement each of ythe Vsupporting arms 5 is shifted from its aforesaid normal upwardly and -forwardly inclined position to an ,upwardly and rearwardly inclined position, whereas each of thebars'7 is swung forward on its `-ting relation to the periphery of an adjacent,y anti-friction roller 19 which is carried by a suitably 'located transverse shaft 20 having 4its'ends mounted in the sills 1.

The aforesaid movement of the arms 5 and bars 7 for producing rearward shifting movement of the truck body is facilitatedby the series of coperating members located intermediate the shaft 15 and the pivot-pin 6. Specifically stated, when the shaft 15 is locked in its bearings 16 by the upward'v and rearward swinging movement I of theoperatlng lever, downwardly dlrected vso force is applied to the forward end of each lever 11 by the bolt or pin 13 carried by the Y adjacent .arm 14 which is fixed on said shaft This force .acts to swing said lever 11 to the' approximately horizontal position vindicated by broken lines in Fig. 1, actuating the vlink l0 to move forward at its lower end','whereby the position of the lower end of the supporting arm 5 is advanced Vpast the pointin which it lies in vertical alinementwith lthe upper pivoted end of` said arm, forcausing said arm to swing back vagainst the adjacent lroller 19. Further rearward movementI of' the lower end of the arm 5 is prevented by engagement of the lever 11 with a suitably located stop 35 formed on the sill 1.` At or adjacent to' the position of the parts shown in broken lines in Fig. 1, the body 'which has been moved manually to such position, becomes` overbalanced and thence moves by force of gravity to the full dumping position shown in Fig. -2 without further application of manual force; and in moving to said dumpg position said body actuates the various operative parts associated therewith to assume the positions shown in Fig, 2, the arms 5 being caused to move `upwardA in engagement with the peripheries of the rollers 19 to permit. of the requisite-inclination of the body. When the requisite inclination has been assumed, the forward end-of the body infr becomes anchored against further movementby the then nearly alined link 18 and Yarm 17'J of the operating lever 17. Movement of saidlink and said arm into true al-inement is prevented ,by a laterally directed lugv or stop 21 formed on said link and which is engaged bylsaid arm at the .proper limit.

- To return the truck body to normal posi- 4end attached to a stationary part of the truck, as to an anchor lug 27 fixed upon a operating arm 17n of the lever 17 is manu-` ally shifted upward and forward to a point slightly in advance of the broken line position indicated in Fig. 1, whereupon said body and the parts associatedtherewith, as aforesaid, will automatically move to the full line position shown-in said figure.

To provide for automatic opening of the end gate 22 carried by the body so that the-contents of th'e latter will unobstructedly fall therefrom when the dumping position is reached, l provide a special mechanism comprising a latch member 23 of bell-crank form pivoted on said bodyadjacent to said v. 'end-gate. I Formed upon one arm of said latch member is a downwardly extending hook-likelug 23a which, in the normal positions of the parts, interlocks vwith a laterally directed lug Y24 carried by the lower end portion of the end-gate, the latter having its upper portion Apivoted to4 said body. The opposite -arm of said latch member 23 haspivoted thereto the rear endof a longitudinally extending rod 36 which is pivoted at its opposite end to an arm of a bell-crank lever 25'pivotally mounted upon the body 3 at a suitable point. Saidlever 25 has attached to theopposite arm thereof an end of a chain 26 whichhas its opposite sill 1. The arrangement of the mechanism just described is such that just prior to the moment when the body reaches its dumping position, the chain 26 is placed under ten- 100 `sion whereby, through the intermediacy `of the bell-crank 25 and rod 36, the latch member 23 is swung to a position in whichits lug 23a is withdrawn from interlocking relation to the end-gate, permitting the latter to swing open.

In the modification illustratedl in Figs. 4 and 5, the pivot-pins 28 carried bythe bolster 50 have rollers 39 mounted thereon. These rollers rest upon theupper surfaces of longitudinally disposed bars 30 which'v f constitute trackways for said rollers and 4which are superposed over the rear endportions of the sills 1.l Each of said bars 30 is pivotally mounted intermediate its ends,

as upon bearing pieces 31 carried by the ad'- jacent sill, and has its rear end pivoted to the upper end of one member of a' toggle lever 32 which normally occupies upright position and has the other member thereof 120 pivotally mounted upon -said sill. In the normal upright. position of said toggle 32 "the upp'ersurfaceof' thelrear end of the vbar 30 is elevated somewhat above that of the forward end. so thattlie rollers 29 which 125 support the truck body will occupy the most advanced position permitted by an upturned stop 30a formed on the. front end of the bar 30, as shown in Fig.' et. When the body tion following the dumping operation, the is to bevshiftedto dumping position, a. lon- 1.30

istante i 5, such inclination. being permitted by providing in the sill the notched out portion, or recess, 3l. `When the inclinations of the Y opposite bars 30 are thus reversed, the rolllill ers 29, travel rearward by gravitation on said bars until they engage upturned stops similar to said stops 30 formed on the rear ends of the bars 30, at which point the center of gravity has become shifted to the eX- tent that the body 3 swings automaticallyI to inclined dumping position.

llt will be noted that, in moving the truck body to dumping position, the force of gravity is utilized with both the' preferred and modified forms of construction of the invention hereinbefore described, the initial movement only being produced by manually applied force.

l. A dump truck comprising sills, a dump body superposed over said sills, supports pivotally mounted upon said sills and 4movable with respect to the latter, said body being pivotally mounted intermediate its ends upon said supportsfmeans for elevating the front end of said body and simultaneously inclining said supports in' an upward and rearward direction whereby said body and the center of gravity of the latter are so shifted that said body thence moves automatically to rearwardly inclined dumping position.

2. A dump truck comprising sills, a dump body superposed over said sills, supports pivotally mounted upon said sills, members pivotally carried by said supports and having said body pivotally mounted thereon, said members and said supports being shiftable with respect-to the pivotal mounting of the latter, and means for elevating the front end of said body and simultaneously shifting the relative positions of said supports and said members whereby said body is carried rearward on the latter to a point at which the force of gravity becomes operative forV carrying said body to inclined dumping position. l

3. A dump truck comprising sills, a dump body superposed over said sills, supports pivotally mounted upon said sills, members pivotally carried by said supports and having' said body pivotally mounted thereon, said members and said supports being shiftable with respect to the pivotal mountings of Athe latter, and means for elevating the front end of said body and simultaneously actuating said members to swing to an upwardly and rearwardly 'inclined position on i said supports whereby the center of gravity is shifted for causing said body to move to inclined dumping position.

' Ll. A dump truck comprising sills, a dump body superposed over saidsills, supports pivotally mounted upon said sills and depending therefrom, members pivotally attached tolthe lower ends of said supports and having said body pivotally mounted upon the upper ends thereof, said members being normally disposed in upwardly and forwardly inclined positions for maintainving said body in its normal horizontal position, means for manually elevating the front end of said body, and means intermediate said elevating means and the lower ends of said members and actuated by the former whereby the latter are shifted to rearwardly inclined positions for carrying said body rearward to a position wherein the force of gravity becomes operative for actuating said body to assume inclined dumping position.

5. A dump truck comprisingl sills, a dump body superposed over said sills, supports pivotally mounted upon said sills and depending therefrom,members pivotally attached to the lower ends of said 'supports and having said body pivotally mounted upon the upper ends thereof, said members being nor-` mally disposed in upwardly and vforwardly inclined positions for maintaining said body in its normal horizontal position, means for manually elevating the front end of said body, and means intermediate said elevating means and the lower ends of said members and actuated by the former whereby the latter are shifted to rearwardly inclined positions, and rollers adapted to be engaged by and to limit the extent of rearward movement of said members, said body being adapted to become overbalanced as the limit of rearward inclination of said members is approached and to automatically swing on the latter to load-dumping position.

6. A dump truck comprising sills, a dump body superposed over said sills, supports pivotally mounted upon said sills and depending therefrom, members pivotally attached to the lower ends of said supports and having said body pivotally mounted upon the upper ends thereof, said members being normally disposed in upwardly and forwardly inclined positions for maintaintomatically swing on the latter to load- .dumping position, said membersbeing actu' ated to travel upward on said rollers as Asaid dumping position is approached.

7. A dump truck` comprising sills, a dump body superposed 'over said sills, supports pivotally mounted upon said' sills and de- I pending therefrom,`members pivotally attached to the lower ends of sa-idsupports and having said body pivotally 4mounted .upon the upperends thereof, said members being normallyA disposed in u Wardly and forwardly inclined positions or maintaining said body in its normal horizontal position, means for manually elevating the front end of said body, and a series of coperating. elements located intermediate said ele vatmgmeans and said members and actn- Latedby the former whereby the positions of` .the latter arefchangedtoproduce a shiftingof the center'fof gravity for actuating said body to assume inclined load-dumping position'. I

In testimony whereof I affix my Signature'. 

